One thing I've been noticing more and more is that long pre-game instructions from referees can take me "out of my game" as an assistant referee. I have no problem with reminders and points of emphasis or even things like "Try to call a foul in the first 10 minutes to let the players know you're watching." What is a problem is when a referee has a lot of specific mechanics that are different from the last referee I worked with and different from the way I'm used to doing things. When you have to remember that, when the referee is unsure of who the ball touched last and looks to me, "Did this referee want me to point the direction with my hand against my stomach or hold the flag at my side with the proper direction or raise the flag straight up in the proper hand or just go ahead and signal the direction of the throw-in?" I'm sure you can add several examples to that. I feel that, if a referee's pre-game with assistant referees is more than about three or four points, the referee is probably doing more harm than good; probably slowing down the assistant referees' reaction time by having to remember all the stuff the referee wants them to do for the referee's comfort level. Please try to answer this post with your assistant referee "hats" on.